package com.it.base.arithmetic;

import java.util.HashMap;

public class test {
    public static void main(String[] args) {
        //初始化负载因子
        HashMap<String,String>  hashMap = new HashMap();
        //测试put方法的整个过程
        hashMap.put("a","aa");
        //正常获取key对应的val
        String val =  hashMap.get("a");
        //查不到的情况
        String valError =  hashMap.get("b");
        Object o = new Object();

    }
}
